TY - JOUR
T1 - A Non-contact Method for Measuring the Charge of a Moving Object Based on Mutual Capacitance Matrix
AU - He, Zhongzheng
AU - Qin, Sichao
AU - Wu, Juan
AU - Qiao, Yu
AU - Li, Pengfei
AU - Chen, Xi
N1 - Publisher Copyright:
© 2001-2012 IEEE.
PY - 2025
Y1 - 2025
N2 - The charge quantity is a fundamental physical parameter that reflects the electrical state of an object. Accurately estimating the charge of an object facilitates the assessment of electrostatic discharge risks and aids in preventing accidents. Measuring the charge of a moving object has long posed a technical challenge in this field. This paper proposes a non-contact method for estimating the charge of a moving object by utilizing the electrostatic signals generated by the object's motion and its motion data. First, a non-contact charge measurement model based on a mutual capacitance matrix was developed using the image charge method in electrostatics. The accuracy of the model was verified through simulations of the charge on the sensing electrode. Next, a correction method for charge calculation was further proposed to reduce measurement errors caused by parasitic capacitance from the experimental setup. Finally, a verification experiment was conducted, wherein an electrometer measured the charge of the object in a stationary state, providing a reference to validate the proposed method. The experimental results demonstrated a strong correlation (r > 0.96) and consistency (within the 95% confidence interval) between the measured and reference values across various conditions. The absolute error of the measurements was within ±1 nC (mean ± standard deviation: -0.04 ± 0.4 nC), with a relative error of approximately ±10%. This study contributes to the prevention of electrostatic discharge accidents involving moving objects and presents novel insights and technological approaches for electrostatic detection.
AB - The charge quantity is a fundamental physical parameter that reflects the electrical state of an object. Accurately estimating the charge of an object facilitates the assessment of electrostatic discharge risks and aids in preventing accidents. Measuring the charge of a moving object has long posed a technical challenge in this field. This paper proposes a non-contact method for estimating the charge of a moving object by utilizing the electrostatic signals generated by the object's motion and its motion data. First, a non-contact charge measurement model based on a mutual capacitance matrix was developed using the image charge method in electrostatics. The accuracy of the model was verified through simulations of the charge on the sensing electrode. Next, a correction method for charge calculation was further proposed to reduce measurement errors caused by parasitic capacitance from the experimental setup. Finally, a verification experiment was conducted, wherein an electrometer measured the charge of the object in a stationary state, providing a reference to validate the proposed method. The experimental results demonstrated a strong correlation (r > 0.96) and consistency (within the 95% confidence interval) between the measured and reference values across various conditions. The absolute error of the measurements was within ±1 nC (mean ± standard deviation: -0.04 ± 0.4 nC), with a relative error of approximately ±10%. This study contributes to the prevention of electrostatic discharge accidents involving moving objects and presents novel insights and technological approaches for electrostatic detection.
KW - Electrostatic sensor
KW - Moving object
KW - Mutual capacitance matrix
KW - Non-contact charge measurement
UR - http://www.scopus.com/inward/record.url?scp=85214819202&partnerID=8YFLogxK
U2 - 10.1109/JSEN.2024.3524277
DO - 10.1109/JSEN.2024.3524277
M3 - Article
AN - SCOPUS:85214819202
SN - 1530-437X
JO - IEEE Sensors Journal
JF - IEEE Sensors Journal
ER -